Speaker
Description
Electron-positron pairs with low invariant mass are a versatile tool for studying the properties of the quark-gluon plasma created in ultra-relativistic heavy-ion collisions. Due to their electromagnetic nature and the variety of sources that can produce such pairs, they allow to study the whole space-time evolution of the system undistorted by strong final-state interactions. However, a correct interpretation of the results observed in heavy-ion collisions is impossible without comprehensive studies of low-mass dielectron production in proton–proton collisions, which allow one to investigate in detail the corresponding analysis tools and techniques. For example, prompt dielectrons emitted from the hot medium need to be disentangled from a large physics background originating from semi-leptonic correlated decays of heavy-flavor hadrons. This separation can be studied in detail in pp collisions by investigating prompt and non-prompt dielectron pair production in the intermediate mass region.
In this talk we present the final results on dielectron production in pp collisions from LHC Run 2 and the latest measurements from LHC Run 3 data recorded with the upgraded ALICE detector. In particular the improvements of the separation of prompt and heavy flavour dielectrons based on their characteristic topological properties will be discussed. The presentation will conclude with a discussion of the current status of the dielectron measurements in Pb–Pb collisions.
| Category | Experiment |
|---|---|
| Collaboration | ALICE |
